摘要
针对叶片测量测头灵活性差、无法兼顾精度和效率的问题,提出了一种免形状、高精度测头系统技术方案。首先基于"同步规划测量"思想,研发了新型免形状光学测头系统,然后分析了系统的工作原理、理论模型和关键技术,最后进行了实验研究,验证了方案的可行性和测头系统的精度水平。研究结果表明,该测头系统在无需输入叶片理论模型数据和姿态精调的情况下,自动进行路径规划并同步完成叶片型面数据的采集。测点数据的采集全部在传感器基准距离附近完成,从而有效地限制了倾角误差,综合测量精度控制在10μm以内。该测头系统具有算法简单、高精度、免形状等特点,在叶片类空间自由曲面测量领域具有较好的应用前景。
To solve the problems of current probes for blade profile metrology, such as poor flexibility, low accuracy and efficiency, a form-free high-precision probe system is proposed in this study. First, a novel and form-free optical probe system is developed based on the concept of "Synchronization of Planning and Measurement". Secondly, the operational principle, the theoretical model and key technologies of the probe system are analyzed in detail. Finally, experimental evaluations are carried out to verify the feasibility and accuracy of the probe technical scheme. Experimental results show that the path planning and the blade profile data collection are achieved simultaneously without theoretical model data and attitude fine-tuning of the blade. The measurement is completed in the positions near the reference distance of the sensor. Thus, the inclination error is effectively limited and the measurement error is reduced to be less than 10 μm. The designed probe system has the advantages of simple algorithm, high precision and form-free, which has a good application prospect in the field of free-form surface measurement.
作者
李学哲
石照耀
李昱坤
林家春
Li Xuezhe;Shi Zhaoyao;Li Yukun;Lin Jiachun(Beijing Engineering Research Center of Precision Measurement Technology and Instruments,College of Mechanical Engineering and Applied Electronics Technology,Beijing University of Technology,Belling 100124,China;College of.Mechanical and Electrical Engineering,North China Institute of Science and Technology,Sanhe 065201,China)
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2018年第12期9-17,共9页
Chinese Journal of Scientific Instrument
基金
国家自然科学基金重点项目(51635001)资助.
关键词
叶片测量
测头系统
同步规划测量
免形状
高精度
blade metrology
probe system
synchronization of planning and measurement
form-free
high-precision
